055052630
2001-03-13
2020-09-14T11:33:27
Discussion of the magnetic and meteorological observations made at the Girard College Observatory, Philadelphia : in 1840, 1841, 1842, 1843, 1844, and 1845 / by A. D. Bache. - Washington : Smithsonian Institution, 1859-1862.
Girard College (Philadelphie, Pa.). Magnetic and meteorological observatory
Girard College (Philadelphie, Pa.). Magnetic and meteorological observatory
Discussion of the magnetic and meteorological observations : made at the Girard College Observatory, Philadelphia : in 1840, 1841, 1842, 1843, 1844, and 1845 / by A. D. Bache / [Washington] : [Smithsonian Institution] , [1859-65]
Discussion of the magnetic and meteorological observations made at the Girard College Observatory, Philadelphia in 1840, 1841, 1842, 1843, 1844, and 1845 Third section, comprising parts VII, VIII, and IX. Vertical force, Investigation of the eleven (or ten) year period, and of the disturbances of the vertical component of the magnetic force and appendix on the magnetic effect of the aurora borealis; with an investigation of the solar diurnal variation, and of the annual inequality of the vertical force; and of the lunar effect on the vertical force, the inclination, and total force / by A. D. Bache,... / [Washington] : [Smithsonian Institution] , 1863
Discussion on the magnetic and meteorological observations made at the Girard College Observatory, Philadelphia in 1840, 1841, 1842, 1843, 1844, and 1845 Part I, Investigation of the eleven year period in the amplitude of the solar-diurnal variation and of the disturbances of the magnetic declination / by A. D. Bache / [Washington : Smithsonian institution] , 1859
Discussion of the magnetic and meteorological observations made at the Girard College Observatory, Philadelphia in 1840, 1841, 1842, 1843, 1844, and 1845 Fourth section, comprising parts X, XI, and XII. Dip and total force, Analysis of the disturbances of the dip and total force ; Discussion of the solar diurnal variation and annual inequality of the dip and total force ; and Discussion of the absolute dip, with the final values for declination, dip and force between 1841 and 1845 / by A. D. Bache,... / [Washington] : [Smithsonian Institution] , 1864